#import <Foundation/Foundation.h>

@implementation Car : NSObject {
    
    @public
    int wheels;
    double speed;
}

- (void) run {
    
    NSLog(@"%i个轮子,%f时速的车子跑起来了!", wheels, speed);
}

@end

int main() {
    
    Car *c = [Car new];
    c->wheels  = 4;
    c->speed = 300;
    
    [c run];
    
    return 0;
}





